Hi, mama! We've been using FBs for about 10 months now, and have dealt with leaks, stink, rashes - you name it. All of those issues were caused by my wash routine. I had to fiddle with it for MONTHS before I finally figured out what worked for us: A cold pre-WASH (full cycle) with no detergent, followed by a HOT wash with Tide powder filled 1/2 way to line 1 (or less) followed by a two cold rinses (and occasionally I'll do another hot/cold full wash cycle with no detergent to make sure everything is out). When I figured this out, I no longer had leaks, or stinkies, and she DD didn't have genital rashes. She HAS, however, developed the same type of rash I think you're describing. She gets red on her upper thighs, and belly, right around where the diaper sits, but she's also developed it on her arms and calves. I felt it once after she dried off from her shower and it was rough and scaly, so I think it's just eczema. We've been making sure to bathe her in lukewarm/warm water instead of hot, and lotioning her after every shower. It gets better after that, but the minute her skin gets too dry it comes right back. I think it's just the dry winter weather.